1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Edward Wang at The University of California, Berkeley. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)wwinschar.c 8.1 (Berkeley) 6/6/93 37 * $FreeBSD: src/usr.bin/window/wwinschar.c,v 1.2.14.1 2001/05/17 09:45:01 obrien Exp $ 38 * $DragonFly: src/usr.bin/window/wwinschar.c,v 1.2 2003/06/17 04:29:34 dillon Exp $ 39 */ 40 41 #include "ww.h" 42 #include "tt.h" 43 44 wwinschar(w, row, col, c, m) 45 register struct ww *w; 46 unsigned char c, m; 47 { 48 register i; 49 int nvis; 50 short x = c | m << WWC_MSHIFT; 51 52 /* 53 * First, shift the line. 54 */ 55 { 56 register union ww_char *p, *q; 57 58 p = &w->ww_buf[row][w->ww_b.r]; 59 q = p - 1; 60 for (i = w->ww_b.r - col; --i > 0;) 61 *--p = *--q; 62 q->c_w = x; 63 } 64 65 /* 66 * If can't see it, just return. 67 */ 68 if (row < w->ww_i.t || row >= w->ww_i.b 69 || w->ww_i.r <= 0 || w->ww_i.r <= col) 70 return; 71 72 if (col < w->ww_i.l) 73 col = w->ww_i.l; 74 75 /* 76 * Now find out how much is actually changed, and fix wwns. 77 */ 78 { 79 register union ww_char *buf; 80 register char *win; 81 register union ww_char *ns; 82 register char *smap; 83 char touched; 84 85 nvis = 0; 86 smap = &wwsmap[row][col]; 87 for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++) 88 ; 89 if (i >= w->ww_i.r) 90 return; 91 col = i; 92 buf = w->ww_buf[row]; 93 win = w->ww_win[row]; 94 ns = wwns[row]; 95 smap = &wwsmap[row][i]; 96 touched = wwtouched[row]; 97 for (; i < w->ww_i.r; i++) { 98 if (*smap++ != w->ww_index) 99 continue; 100 touched |= WWU_TOUCHED; 101 if (win[i]) 102 ns[i].c_w = 103 buf[i].c_w ^ win[i] << WWC_MSHIFT; 104 else { 105 nvis++; 106 ns[i] = buf[i]; 107 } 108 } 109 wwtouched[row] = touched; 110 } 111 112 /* 113 * Can/Should we use delete character? 114 */ 115 if ((tt.tt_inschar || tt.tt_insspace) && nvis > (wwncol - col) / 2) { 116 register union ww_char *p, *q; 117 118 if (tt.tt_inschar) 119 xxinschar(row, col, c, m); 120 else { 121 xxinsspace(row, col); 122 x = ' '; 123 } 124 p = &wwos[row][wwncol]; 125 q = p - 1; 126 for (i = wwncol - col; --i > 0;) 127 *--p = *--q; 128 q->c_w = x; 129 } 130 } 131